Bryson, John, author
Penguin Books, 1982
Buku Teks
Eleanor O'Leary.
Wiley-Blackwell, 2013
Buku Teks
Verne, Jules, author
[publisher not identified], [date of publication not identified]
Buku Klasik
Mintzber, Henry
Prentice-Hall, 1983
Buku Teks
Beziau, Jean-Yves, editor
[Springer , ], 2012
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